:root{
    --black: #0a0a0a;
    --near-black: #121212;
    --white: #ffffff;
    --off-white: #fafaf9;
    --gray-100: #f2f2f0;
    --gray-200: #e4e4e1;
    --gray-300: #d1d1cd;
    --gray-500: #8a8a86;
    --gray-600: #6b6b67;
    --gray-700: #454542;
    --red: #e8341e;
    --max-w: 1120px;
  }

  *{ margin:0; padding:0; box-sizing:border-box; }

  html{ scroll-behavior: smooth; }

  body{
    background: var(--off-white);
    color: var(--black);
    font-family: 'Manrope', sans-serif;
    font-weight: 400;
    line-height: 1.5;
    -webkit-font-smoothing: antialiased;
    overflow-x: hidden;
  }

  ::selection{ background: var(--red); color: var(--white); }

  .font-mono{ font-family: 'JetBrains Mono', monospace; }
  .font-sig{ font-family: 'Caveat', cursive; }

  img, svg{ display:block; max-width:100%; }

  a{ color: inherit; text-decoration:none; }

  .wrap{
    max-width: var(--max-w);
    margin: 0 auto;
    padding: 0 32px;
  }

  .eyebrow{
    font-family: 'JetBrains Mono', monospace;
    font-size: 12px;
    letter-spacing: 0.18em;
    text-transform: uppercase;
    color: var(--gray-600);
    display: inline-flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 22px;
  }

  .eyebrow::before{
    content: '';
    width: 22px;
    height: 1px;
    background: var(--gray-500);
  }

  h1, h2, h3{
    font-family: 'Manrope', sans-serif;
    font-weight: 700;
    letter-spacing: -0.02em;
    line-height: 1.08;
  }

  section{
    padding: 140px 0;
    position: relative;
  }

  .section-title{
    font-size: clamp(28px, 3.6vw, 46px);
    max-width: 720px;
    margin-bottom: 26px;
  }

  .section-copy{
    font-size: 18px;
    color: var(--gray-700);
    max-width: 560px;
    line-height: 1.75;
  }

  .divider{
    width: 100%;
    height: 1px;
    background: var(--gray-200);
  }

  /* reveal on scroll */
  .reveal{
    opacity: 0;
    transform: translateY(24px);
    transition: opacity 0.9s cubic-bezier(.16,.8,.3,1), transform 0.9s cubic-bezier(.16,.8,.3,1);
  }
  .reveal.is-visible{
    opacity: 1;
    transform: translateY(0);
  }

  /* ---------- NAV ---------- */
  nav{
    position: fixed;
    top: 0; left: 0; right: 0;
    z-index: 100;
    padding: 26px 0;
    transition: background 0.4s ease, backdrop-filter 0.4s ease, padding 0.4s ease, border-color 0.4s ease;
    border-bottom: 1px solid transparent;
  }
  nav.scrolled{
    background: rgba(250, 250, 249, 0.82);
    backdrop-filter: blur(14px) saturate(140%);
    -webkit-backdrop-filter: blur(14px) saturate(140%);
    padding: 18px 0;
    border-bottom: 1px solid var(--gray-200);
  }
  nav .wrap{
    display:flex;
    align-items:center;
    justify-content:space-between;
  }
  .logo{
    font-family: 'Manrope', sans-serif;
    font-weight: 300;
    font-size: 19px;
    letter-spacing: 0.28em;
  }
  .nav-cta{
    font-family: 'JetBrains Mono', monospace;
    font-size: 12px;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    border: 1px solid var(--black);
    padding: 9px 18px;
    border-radius: 999px;
    transition: background 0.25s ease, color 0.25s ease;
  }
  .nav-cta:hover{ background: var(--black); color: var(--white); }

  /* ---------- HERO ---------- */
  .hero{
    padding: 200px 0 100px;
    min-height: 100svh;
    display: flex;
    align-items: center;
  }
  .hero .wrap{
    display: grid;
    grid-template-columns: 1.05fr 0.95fr;
    gap: 60px;
    align-items: center;
  }
  .hero-headline{
    font-size: clamp(38px, 5.4vw, 68px);
    margin-bottom: 26px;
  }
  .hero-sub{
    font-size: 19px;
    color: var(--gray-700);
    max-width: 460px;
    margin-bottom: 44px;
    line-height: 1.7;
  }
  .cta-row{
    display:flex;
    align-items:center;
    gap: 22px;
    flex-wrap: wrap;
  }
  .btn-primary{
    font-family: 'JetBrains Mono', monospace;
    font-size: 13px;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    background: var(--black);
    color: var(--white);
    padding: 17px 34px;
    border-radius: 999px;
    display: inline-block;
    transition: transform 0.25s ease, background 0.25s ease;
    border: 1px solid var(--black);
  }
  .btn-primary:hover{ transform: translateY(-2px); background: #232323; }
  .btn-ghost{
    font-family: 'JetBrains Mono', monospace;
    font-size: 13px;
    letter-spacing: 0.05em;
    color: var(--gray-700);
    display: inline-flex;
    align-items: center;
    gap: 8px;
  }
  .btn-ghost::after{ content:'→'; transition: transform 0.2s ease; }
  .btn-ghost:hover::after{ transform: translateX(3px); }

  /* device mockup */
  .device-stage{
    display:flex;
    justify-content:center;
    align-items:center;
    position: relative;
  }
  .device-stage::before{
    content:'';
    position:absolute;
    width: 380px; height: 380px;
    background: radial-gradient(circle, rgba(0,0,0,0.06) 0%, rgba(0,0,0,0) 70%);
    border-radius: 50%;
    z-index: 0;
  }
  .device{
    position: relative;
    width: 100%;
    max-width: 420px;
    z-index: 1;
    filter: drop-shadow(0 30px 40px rgba(0,0,0,0.10));
    animation: float 7s ease-in-out infinite;
  }
  @keyframes float{
    0%, 100%{ transform: translateY(0px); }
    50%{ transform: translateY(-14px); }
  }
  .device img{ width: 100%; height: auto; }
  .device-screen-overlay{
    position:absolute;
    top: 21%;
    left: 21%;
    width: 58%;
    height: 33%;
    display:flex;
    flex-direction:column;
    align-items:center;
    justify-content:center;
    gap: 8px;
    border-radius: 26px;
    overflow:hidden;
  }
  .rec-dot{
    width: 9px; height: 9px;
    background: var(--red);
    border-radius: 50%;
    animation: pulse-dot 1.6s ease-in-out infinite;
  }
  @keyframes pulse-dot{
    0%, 100%{ opacity: 1; box-shadow: 0 0 0 0 rgba(232,52,30,0.5); }
    50%{ opacity: 0.55; box-shadow: 0 0 0 6px rgba(232,52,30,0); }
  }
  .rec-row{
    display:flex;
    align-items:center;
    gap: 7px;
  }
  .rec-time{
    font-family: 'JetBrains Mono', monospace;
    color: #eee;
    font-size: 11px;
    letter-spacing: 0.05em;
  }
  .rec-wave{
    display:flex;
    align-items:flex-end;
    gap: 3px;
    height: 16px;
  }
  .rec-wave span{
    width: 2.5px;
    background: rgba(255,255,255,0.55);
    border-radius: 2px;
    animation: wave 1.2s ease-in-out infinite;
  }
  .rec-wave span:nth-child(1){ height:40%; animation-delay: 0s; }
  .rec-wave span:nth-child(2){ height:80%; animation-delay: 0.15s; }
  .rec-wave span:nth-child(3){ height:55%; animation-delay: 0.3s; }
  .rec-wave span:nth-child(4){ height:95%; animation-delay: 0.45s; }
  .rec-wave span:nth-child(5){ height:35%; animation-delay: 0.6s; }
  .rec-wave span:nth-child(6){ height:65%; animation-delay: 0.75s; }
  @keyframes wave{
    0%, 100%{ transform: scaleY(0.5); opacity: 0.5; }
    50%{ transform: scaleY(1); opacity: 1; }
  }

  /* ---------- PHOTO BREAK ---------- */
  .photo-break{
    width: 100%;
    margin: 56px 0;
  }
  .photo-break img{
    width: 100%;
    height: 62vh;
    min-height: 380px;
    max-height: 680px;
    object-fit: cover;
    display: block;
  }
  .photo-caption{
    max-width: var(--max-w);
    margin: 18px auto 0;
    padding: 0 32px;
    font-family: 'JetBrains Mono', monospace;
    font-size: 12.5px;
    color: var(--gray-500);
    letter-spacing: 0.02em;
  }

  /* ---------- SECTIONS 2-col ---------- */
  .split{
    display:grid;
    grid-template-columns: 1fr 1fr;
    gap: 80px;
    align-items: start;
  }
  .split-right{ padding-top: 8px; }

  /* problema — quote block */
  .quote-block{
    font-family:'Manrope', sans-serif;
    font-weight: 600;
    font-size: clamp(22px, 2.6vw, 30px);
    line-height: 1.5;
    color: var(--black);
    border-left: 2px solid var(--black);
    padding-left: 28px;
    margin-top: 36px;
  }

  /* ---------- COMO FUNCIONA ---------- */
  .steps{
    margin-top: 70px;
    display: grid;
    grid-template-columns: repeat(5, 1fr);
    gap: 0;
  }
  .step{
    position: relative;
    padding: 0 20px 0 0;
    border-top: 1px solid var(--gray-300);
    padding-top: 26px;
  }
  .step-num{
    font-family:'JetBrains Mono', monospace;
    font-size: 13px;
    color: var(--gray-500);
    margin-bottom: 18px;
    display:block;
  }
  .step-title{
    font-family:'Manrope', sans-serif;
    font-weight: 700;
    font-size: 18px;
    margin-bottom: 10px;
  }
  .step-copy{
    font-size: 14.5px;
    color: var(--gray-600);
    line-height: 1.6;
  }
  .step.is-rec .step-num{ color: var(--red); }

  /* ---------- POR QUE NO CELULAR ---------- */
  .compare{
    margin-top: 60px;
    display:grid;
    grid-template-columns: 1fr 1fr;
    gap: 1px;
    background: var(--gray-200);
    border-radius: 20px;
    overflow: hidden;
  }
  .compare-col{
    background: var(--off-white);
    padding: 44px 40px;
  }
  .compare-col.dark{
    background: var(--black);
    color: var(--white);
  }
  .compare-label{
    font-family:'JetBrains Mono', monospace;
    font-size: 12px;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--gray-500);
    margin-bottom: 22px;
    display:block;
  }
  .compare-col.dark .compare-label{ color: var(--gray-300); }
  .compare-list{
    list-style:none;
    display:flex;
    flex-direction:column;
    gap: 14px;
  }
  .compare-list li{
    font-size: 15.5px;
    color: var(--gray-700);
    padding-left: 20px;
    position: relative;
  }
  .compare-col.dark .compare-list li{ color: var(--gray-200); }
  .compare-list li::before{
    content:'—';
    position:absolute; left:0; color: var(--gray-400);
  }
  .compare-col.dark .compare-list li::before{ content:'●'; color: var(--red); font-size: 8px; top: 6px; }

  /* ---------- PRIVACIDAD ---------- */
  .privacy-grid{
    margin-top: 60px;
    display:grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 48px;
  }
  .privacy-item{
    border-top: 1px solid var(--gray-300);
    padding-top: 24px;
  }
  .privacy-item h3{
    font-size: 20px;
    margin-bottom: 12px;
    font-weight: 700;
  }
  .privacy-item p{
    font-size: 15px;
    color: var(--gray-600);
    line-height: 1.65;
  }

  /* ---------- PENSADO PARA ---------- */
  .use-grid{
    margin-top: 60px;
    display:grid;
    grid-template-columns: repeat(3, 1fr);
    border-top: 1px solid var(--gray-300);
    border-left: 1px solid var(--gray-300);
  }
  .use-item{
    border-right: 1px solid var(--gray-300);
    border-bottom: 1px solid var(--gray-300);
    padding: 40px 32px;
    transition: background 0.3s ease;
  }
  .use-item:hover{ background: var(--gray-100); }
  .use-index{
    font-family:'JetBrains Mono', monospace;
    font-size: 12px;
    color: var(--gray-500);
    display:block;
    margin-bottom: 30px;
  }
  .use-name{
    font-size: 19px;
    font-weight: 700;
  }

  /* ---------- FILOSOFIA ---------- */
  .philosophy{
    background: var(--black);
    color: var(--white);
    text-align:center;
  }
  .philosophy .eyebrow{ color: var(--gray-500); justify-content:center; }
  .philosophy .eyebrow::before{ background: var(--gray-600); }
  .philosophy-title{
    font-size: clamp(30px, 4.6vw, 54px);
    max-width: 820px;
    margin: 0 auto 30px;
  }
  .philosophy-copy{
    font-size: 18px;
    color: var(--gray-300);
    max-width: 560px;
    margin: 0 auto;
    line-height: 1.8;
  }
  .philosophy .wrap{ text-align:center; display:flex; flex-direction:column; align-items:center; }

  /* ---------- FINAL CTA ---------- */
  .final-cta{
    text-align:center;
  }
  .final-cta .wrap{ display:flex; flex-direction:column; align-items:center; }
  .final-title{
    font-size: clamp(30px, 4vw, 48px);
    max-width: 640px;
    margin-bottom: 20px;
  }
  .final-copy{
    color: var(--gray-600);
    font-size: 17px;
    margin-bottom: 44px;
  }
  .reserve-form{
    display:flex;
    gap: 10px;
    width: 100%;
    max-width: 420px;
  }
  .reserve-form input{
    flex:1;
    font-family:'JetBrains Mono', monospace;
    font-size: 13.5px;
    padding: 16px 20px;
    border-radius: 999px;
    border: 1px solid var(--gray-300);
    background: var(--white);
    outline: none;
    transition: border-color 0.2s ease;
  }
  .reserve-form input:focus{ border-color: var(--black); }
  .reserve-form button{
    font-family:'JetBrains Mono', monospace;
    font-size: 12.5px;
    letter-spacing: 0.06em;
    text-transform: uppercase;
    background: var(--black);
    color: var(--white);
    border: none;
    padding: 0 26px;
    border-radius: 999px;
    cursor: pointer;
    transition: background 0.2s ease;
    white-space: nowrap;
  }
  .reserve-form button:hover{ background: #232323; }
  .form-note{
    margin-top: 18px;
    font-family:'JetBrains Mono', monospace;
    font-size: 12px;
    color: var(--gray-500);
    letter-spacing: 0.03em;
  }
  .form-success{
    display:none;
    font-family:'JetBrains Mono', monospace;
    font-size: 13.5px;
    color: var(--black);
    align-items:center;
    gap: 8px;
  }
  .form-success .rec-dot{ width:7px; height:7px; }

  /* ---------- FOOTER ---------- */
  footer{
    padding: 90px 0 50px;
    border-top: 1px solid var(--gray-200);
  }
  .footer-top{
    display:grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    margin-bottom: 80px;
  }
  .footer-logo{
    font-family:'Manrope', sans-serif;
    font-weight: 300;
    font-size: 22px;
    letter-spacing: 0.28em;
    margin-bottom: 16px;
  }
  .footer-sig{
    font-family:'Caveat', cursive;
    font-size: 22px;
    color: var(--gray-600);
  }
  .manifesto{
    font-size: 18px;
    color: var(--gray-700);
    line-height: 1.7;
    max-width: 460px;
  }
  .footer-bottom{
    display:flex;
    justify-content:space-between;
    align-items:center;
    padding-top: 30px;
    border-top: 1px solid var(--gray-200);
    font-family:'JetBrains Mono', monospace;
    font-size: 12px;
    color: var(--gray-500);
    letter-spacing: 0.03em;
    flex-wrap: wrap;
    gap: 12px;
  }
  .footer-links{
    display:flex;
    gap: 24px;
  }
  .footer-links a:hover{ color: var(--black); }

  /* ---------- RESPONSIVE ---------- */
  @media (max-width: 860px){
    section{ padding: 90px 0; }
    .hero{ padding: 140px 0 70px; }
    .hero .wrap{ grid-template-columns: 1fr; gap: 60px; }
    .hero .device-stage{ order: -1; }
    .split{ grid-template-columns: 1fr; gap: 36px; }
    .steps{ grid-template-columns: 1fr 1fr; gap: 32px 20px; }
    .compare{ grid-template-columns: 1fr; }
    .privacy-grid{ grid-template-columns: 1fr; gap: 34px; }
    .use-grid{ grid-template-columns: 1fr 1fr; }
    .footer-top{ grid-template-columns: 1fr; gap: 40px; }
    .reserve-form{ flex-direction: column; }
    .wrap{ padding: 0 22px; }
  }
  @media (max-width: 520px){
    .steps{ grid-template-columns: 1fr 1fr; }
    .use-grid{ grid-template-columns: 1fr; }
    .photo-break img{ height: 320px; min-height: unset; }
  }